Environment23
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A Faustian Choice: Population and Environment
Population growth is a key contributor to the pressures pushing at our planetary boundaries. In Rio+20 discussions, implications of population growth have become shrouded in platitudes. It is important that discussions on planetary limits clearly lay out possible strategies that can alleviate these pressures.
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Goals for Rio: A Path to Sustainability
In an article published in The Lancet, Earth Institute Director Jeffrey Sachs outlines his own ideas for sustainable development goals, and how how these goals can build on the Millennium Development Goals, the UN’s set of targets that aim to reduce extreme poverty and boost social well-being in many other ways by 2015.
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For Rio+20, a Call to Preserve Biodiversity
An estimated 9 million species of living things inhabit the Earth. But those species are disappearing at an alarming rate, and this loss of biodiversity appears to be a major driver of environmental changes that can affect the biological and chemical processes that humans rely on.
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An Interactive Map of Scientific Fieldwork
Earth Institute scientists explore how the physical world works on every continent — over and under the arctic ice, in the grasslands of Mongolia, on volcanoes in Patagonia, over subduction zones in Papua New Guinea, and on the streets of New York City.
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Exploring the Bering Sea Ecosystem
Our stations have continued to be rich in phytoplankton, while our colleagues are excited by the larval fish they are finding in the southern Bering Sea. Wildlife sightings have included whales, dolphin, and the jawless lamprey fish, and we are settling in for potentially bumpy seas ahead.
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World Climate Policies: Substantial Progress But Enormous Challenges Remain
Recent analysis by Deutsche Bank Climate Change Advisory (DBCCA) in conjunction with the Columbia Climate Center, shows that the existing world climate policies have the potential to substantially reduce CO2 emissions, but are not aggressive enough to meet the suggested 450 ppm stabilization pathways.
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A Trip Along the High Line
The Highline, a park built on an old rail line on the lower West Side of New York City, pays homage to the area’s industrial past while providing locals and tourists alike with a place for repose.
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Expanding Overseas Study Opportunities
A golf-ball-sized rhinoceros beetle flies through the open-air pavilion and lands on my table. I look up from my notes, an attempt at reworking my African wild dog study methods, and realize I haven’t seen one of these mighty beasts since my junior year in South Africa. The beetle is a welcome companion on this…
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Rare Earth Metals: Another Challenge for the Green Economy?
Rare earth metals play an important role in our envisaged carbon-free future, but their availability in the future is under question for different political and availability issues, which is worrying for planned reductions in greenhouse gas emissions.

The first Earth Day in 1970 ignited a movement to stop polluting our planet. This Earth Month, join us in our commitment to realizing a just and sustainable future for our planet. Visit our Earth Day website for ideas, resources, and inspiration.