For example, the report says North America "has already experienced substantial ecosystem, social and cultural disruption from recent climate extremes," such as hurricanes and wildfires.
But the present is nothing compared to the future.
Global warming soon will "affect everyone's life ... it's the poor sectors that will be most affected," Romero Lankao said.
And co-author Terry Root of Stanford University said: "We truly are standing at the edge of mass extinction" of species.
The report included these likely results of global warming:
_Hundreds of millions of Africans and tens of millions of Latin Americans who now have water will be short of it in less than 20 years. By 2050, more than 1 billion people in Asia could face water shortages. By 2080, water shortages could threaten 1.1 billion to 3.2 billion people, depending on the level of greenhouse gases that cars and industry spew into the air.
_Death rates for the world's poor from global warming-related illnesses, such as malnutrition and diarrhea, will rise by 2030. Malaria and dengue fever, as well as illnesses from eating contaminated shellfish, are likely to grow.
_Europe's small glaciers will disappear with many of the continent's large glaciers shrinking dramatically by 2050. And half of Europe's plant species could be vulnerable, endangered or extinct by 2100.
_By 2080, between 200 million and 600 million people could be hungry because of global warming's effects.
_About 100 million people each year could be flooded by 2080 by rising seas.
_Smog in U.S. cities will worsen and "ozone-related deaths from climate (will) increase by approximately 4.5 percent for the mid-2050s, compared with 1990s levels," turning a small health risk into a substantial one.
_Polar bears in the wild and other animals will be pushed to extinction.
_At first, more food will be grown. For example, soybean and rice yields in Latin America will increase starting in a couple of years. Areas outside the tropics, especially the northern latitudes, will see longer growing seasons and healthier forests.
Looking at different impacts on ecosystems, industry and regions, the report sees the most positive benefits in forestry and some improved agriculture and transportation in polar regions. The biggest damage is likely to come in ocean and coastal ecosystems, water resources and coastal settlements.