The harmful effects of global warming are already showing up. Within a couple of decades hundreds of millions of people won’t have enough water to satisfy their own needs.

At the same time, tens of millions of others will be flooded out of their homes each year as the Earth suffers rising temperatures and sea levels, according to portions of a draft of an international scientific report obtained by The Associated Press.

Tropical diseases like malaria will spread. By 2050, polar bear habitats will be extinguished and the only of these bears will be found in zoos. Pests like fire ants will thrive on these harsh conditions.

For a time, food will be plentiful because of the longer growing season in northern regions. But by 2080, hundreds of millions of people could face starvation if the predictions are correct.

Scientists are highly confident that many current problems, such as the change in species’ habits and habitats, the increasing acidification of oceans, the loss of wetlands, the bleaching of coral reefs and the increases in allergy-inducing pollen, can be blamed on global warming.

For example, one CNN report said North America “has already experienced substantial ecosystem, social and cultural disruption from recent climate highs,” such as hurricanes and wildfires.

Global warming will also affect our agriculture and will cause us to harvest as much as 40 million fewer crops each year. The scientists say that we only need a 3 to 5 degree increase before our crops begin to suffer. We are estimated to hit this increase before the year 2010.

More than 100,000 cubic feet of snow had to be imported by helicopter for the unseasonably dry 2007 World Cup ski races in Kitzbuhel, Austria.

“The future is already looking worse than we ever predicted,” said scientists, and we can’t fix what is already damaged.