THEY TOLD US SO
When I was an undergraduate student at Virginia Tech from 1976-79, in several environmental science, geography, and ecology classes we were taught about global warming and climate change due to human activities such as burning fossil fuels and deforestation. The physics behind warming due to increasing atmospheric concentrations of carbon dioxide, methane, and other greenhouse gases had been well known for nearly a century by that time, and the fact that carbon dioxide concentrations in the atmosphere were increasing was also firmly established. Empirical evidence suggesting that human-caused climate change was already occurring was beginning to accumulate.