Direct evidence of human contribution to atmospheric co 2 they are also able to determine the contributions of global warming to extreme events . Scientists know that the earth is warming and most of them acknowledge that it has warmed about one degree in the past hundred years what many of . The percentage contribution to global warming over the past 50 65 years in two categories human causes left and natural causes right from various . The amount of warming caused by the anthropogenic increase in atmospheric co2 may be one of the most misunderstood subjects in climate science many people . Anthropogenic emissions contribute substantially to global warming here you will find scientific evidence supporting that statement
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