Original sentence: This differs from both scientific usage and dictionary definitions, in which "global warming" is an increase in the global mean atmospheric temperature without implying that the increase is "severe" or will have "disastrous environmental consequences
Edited sentence: Although this may differ from both scientific usage and dictionary definitions, in which "global warming" is an increase in the global mean atmospheric temperature, it does relate directly to the Gore-driven hysteria that the increase will be "severe" and will have "disastrous environmental consequences", possibly resulting in millions of deaths