It does not work both ways, it only works one way: the Earth is undergoing a change and we are in for a rough ride.
Yes I can find evidence for you, just one moment.
edit: "The 2001 joint statement was signed by the scientific academies of Australia, Belgium, Brazil, Canada, the Caribbean, China, France, Germany, India, Indonesia, Ireland, Italy, Malaysia, New Zealand, Sweden, and the UK. The 2005 statement added Japan, Russia, and the U.S. The 2007 statement added Mexico and South Africa. Professional societies include American Meteorological Society, American Geophysical Union, American Institute of Physics, American Astronomical Society, American Association for the Advancement of Science, Stratigraphy Commission of the Geological Society of London, Geological Society of America, American Chemical Society, and Engineers Australia." - do you trust Wikipedia?
Yes it is called evolution and evolution will favour jellyfish.
"Very soon" is the next 100 years as far as I have been made to believe.
edit: When the Earth cools down again 50,000 years later; we might have been wiped out. Don't you care about our own survival at all? Don't you agree that we must do something now rather than wait for the big squeeze and see if we're lucky enough for evolution to choose us? (irony intended)
As for whether the government should be lying to us... I would like to think that governments across the world have not bribed multitudes of scientists to come up with "fake" evidence. edit: If they did then fair play to them, it was very well done. Stalin would've been proud.