Today is Earth Day, a day set aside for awarenesss and appreciation of the Earth's environment, and our roles within it - this year marking the 40th anniversary of Earth Day. As a way to help appreciate and observe our environment, I've collected 40 images below, each a glimpse into some aspect of the world around us, how it affects and sustains us, and how we affect it. Happy Earth Day everyone.
This view of Earth, featuring North, Central and South America was taken by the NASA probe called Messenger, while conducting a fly-by of our planet in order to pick up a gravity-assist boost on its way toward Mercury. (NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington)
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A farmer tends to his blooming rape seed field in the hills above Burford in the Cotswolds on April 21, 2009 in Burford, United Kingdom. (Christopher Furlong/Getty Images) #
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This undated handout photo provided by the journal Science shows Iron oxides staining the snout of the Taylor Glacier, in the McMurdo Dry Valleys, Antarctica, forming a feature commonly referred to as Blood Falls. The iron originates from ancient subglacial brine that episodically discharges to the surface. Outflow collected at Blood Falls provides access to a unique subglacial ecosystem that harbors a microbial consortium which actively cycles iron, sulfur and carbon for growth. (AP Photo/ Science, Benjamin Urmston) #
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Sprinklers water a field at sunset on April 16, 2009 north of Buttonwillow, California. Central Valley farmers and farm workers are suffering through the third year of the worsening California drought with extreme water shortages and job losses. (David McNew/Getty Images) #
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Local miner Cesar Abac uses a wooden bowl and mercury to pan for gold near at the village of Las Cristinas, southern Bolivar State, Venezuela on January 30, 2009. Four centuries after the lure of Venezuelan gold brought ruin to English explorer Sir Walter Raleigh, the riches at one giant mine some say is cursed still haunt treasure hunters from across the globe. But the Las Cristinas saga, involving a ghost town, environmental devastation and fist-sized nuggets, underlines the risks of business in Venezuela, where the draw of natural wealth has been dulled by rule changes and economic turmoil. (REUTERS/Henry Romero) #
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This photo from 1997, released by Woods Hole Oceanographic Institution shows the robotic arm of a three-person submersible aquatic vehicle reaching toward a hydrothermal vent in the east Pacific Ocean far off the coast of Chile. New technology and worldwide demand for metals have combined to make deep ocean mining of the mineral-laden liquid spewed from these vents a possibility. (AP Photo/Woods Hole Oceanographic Institution, Pat Hickey) #
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A humpback whale raises its tail as it prepares for a deep dive in the Santa Barbara Channel off the coast of Oxnard, Calif. on Sunday afternoon, April 19, 2009. The offshore oil platform "Gail" is seen in the background. (AP Photo/The Santa Barbara News-Press, Mike Eliason) #
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Ferid Sinan, a 40-year-old Bosnian man, carries a bag of coal out of an illegal coal mine, where he lives and works, near the central Bosnian town of Kakanj,30 kms north of Sarajevo, on Friday, March 13, 2009 . Sinan lives and works in the improvised mine which he dug himself, collecting low quality coal with his hands and primitive tools to make a living earning less than 5 euros per bag. (AP Photo/Amel Emric) #
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Sunrise in windy Langdon, North Dakota, where the Langdon Wind Energy Center can be found. The center produces 159 megawatts with over 100 turbines. (Essdras M Suarez/Globe staff) #
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Workers stand by to mount a propeller as a crane lifts it to the top of a power-generating windmill turbine in the northern German city of Hamburg on March 20, 2009. This single turbine can produce 6 megawatts of energy and is the first of two new power-generating windmills, built in the harbour area of Hamburg. (REUTERS/Morris Mac Matzen) #
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A silhouette of a single snow goose is seen as it flies beneath the moon at the Middle Creek Wildlife Management Area in Kleinefeltersville, Pa. Snow geese are on their spring migration north to their nesting habitats in arctic tundra regions. (AP Photo/Carolyn Kaster, File) #
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Analyzing a variety of samples from the atmosphere above the Amazon, Ilan Koren and colleagues at the Weizmann Institute in Israel, show in the journal Science that smoke and other so-called "aerosol" particles can encourage or discourage cloud formation, depending on the conditions, and a their new scientific model shows how these two processes produce a joint effect on climate. (Science/AAAS) #
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An Afghan man mines rock to make sand for use in construction in Kabul, Afghanistan on April 13, 2009. (REUTERS/Omar Sobhani) #
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Snow-covered pine trees sit in flood water March 31, 2009 near Moorhead, Minnesota. A snowstorm had slowed recovery efforts as residents of Moorhead and neighboring Fargo, North Dakota returned to their homes as the Red River slowly receded. (Scott Olson/Getty Images) #
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A North Dakota Air National Guard helicopter carries six 1,000-pound sandbags to the edge of the Clausen Springs dam Wednesday, April 15, 2009, as an attempt was being made to control the erosion of the emergency spillway. (AP Photo/ The Forum, Dave Wallis ) #
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This undated photo provided by BrightSource Energy shows their Luz Power Tower in Israel's Negev Desert (mirrors concentrate sunlight on the tower at center). BrightSource has proposed building three solar-energy generation complexes in the eastern Mojave Desert several miles from an old mining and railroad townsite called Ivanpah, Calif. A westward dash to power electricity-hungry cities by cashing in on the Mojave's most abundant resource - sunshine - is clashing with efforts to protect species like the tiny pupfish and desert tortoise. (AP Photo/BrightSource, Eilon Paz) #
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Solar panels stand in a field of flowers at Acciona SA's solar power station in Amareleja, Portugal, on Tuesday, April 14, 2009. The 46-megawatt facility, has a production capacity of 93 million kilowatt-hours a year, and is the world's biggest photovoltaic electricity plant. (Mario Proenca/Bloomberg News) #
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An enormous iceberg, right, breaks off the Knox Coast in the Australian Antarctic Territory on Jan. 11, 2008. (AP Photo/Torsten Blackwood, Pool) #
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An aerial photograph shows a wall being built by Rio de Janeiro city hall to limit the expansion of the Santa Marta slum and stop encroaching on the neighboring forest in Rio de Janeiro, Brazil on March 28, 2009. (REUTERS/Bruno Domingos) #
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Stars in the night sky rotate above the distinctive chimney stack on the top of Cape Cornwall near St. Just on April 12, 2009 in Cornwall, England. The landmark, orginally built for the Cape Cornwall Mine in 1850 and was recently damaged when it was struck by lightning, was bought, along with the rest of Cape Cornwall, for the nation by Heinz in 1987 and given to the National Trust to mark Heinz's centenary. (Matt Cardy/Getty Images) #
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