Not true at all. We have plenty of evidence that humans are causing the rise of C02 emissions. Just simply look at the C14 (Carbon 14) and C12/13 (Carbon 12 and Carbon 13) ratios in the atmosphere. These give a clear signal what is causing the rise of carbon and where the carbon is coming from.

> People should not just accept what these people say as gospel, we have had 30-40 years of doomsday warnings from these people

Yes, and right now, the predictions from the credible scientists are showing to be true. Their predictions were not end of the world in 30-40 years, but we would start to see the effects of climate change, and we are starting to see the effects of climate change.

Re: Alternative energy: It doesn't matter if fusion/nuclear/any renewable is "perfected" if Carbon Dioxide is at such high levels that every air conditioning unit needs a CO2 scrubber attached because outdoor the concentration reaches 1000ppm and people's brains literally start to get dumber.

So what you're saying is that the proof that we have in labs isn't good enough for you?

> we have had 30-40 years of doomsday warnings from these people and nothing, absolutely nothing has happened.

What do you classify as nothing? We've shown that the ice caps are melting [0], that temperatures are increasing rapidly across the globe [1], sea walls are being built to stop cities from flooding [2] [3].

[0] https://www.youtube.com/watch?v=8auMIfF50Ng&feature=youtu.be [1] https://climate.nasa.gov/vital-signs/global-temperature/ [2] https://www.independent.co.uk/arts-entertainment/photography... [3] https://www.youtube.com/watch?v=0vj8m0Nqr7s