Global Warming

The future of humanity

Impacts of climate change

When it comes to connecting the dots between climate change, extreme weather and health, the lines are clear.

The earth is saying something with record heat, drought, storms and fire. Scientists are telling us this is what global warming looks like.

Worst Case Climate Change (2008 TED Talk)

Climate change,water and risks

Climate change will have a significant impact on the sustainability of water supplies in the coming decades. A new analysis, performed by consulting firm Tetra Tech for the Natural Resources Defense Council (NRDC), examined the effects of global warming on water supply and demand in the contiguous United States. The study found that more than 1,100 counties -- one-third of all counties in the lower 48 -- will face higher risks of water shortages by mid-century as the result of global warming. More than 400 of these counties will face extremely high risks of water shortages.
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Clues of climate change

Scientists look in many places to find clues about climate change. For example, they examine historical records; collect measurements; and observe trends in temperature, weather patterns, sea level, and other features of the environment. Because there are so many clues from all over the world, we know that climate change is already happening today.
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Main findings

The effects of additional climate drivers that will be superimposed upon natural resource systems and their management cannot be predicted with high certainty.

These climate-driven pressures are on top of other existing drivers adversely affecting water availability for agriculture and it is expected that climate change will intensify competition.

Reconciling this competition will be the main water management challenge and agriculture will have to address the challenge much more progressively. Allocations to cities, industry, rural water supply and sanitation are unlikely to be materially affected by climate change but, collectively, they will reduce the quantity of water that can be allocated to agricultural use and hydro-environmental services.