I don't mean to pick you out in particular, and there's dozens of posts I could have chosen.
But what is this "ruined" you speak of?
I mean "ruined" in the context of our planet, is pretty emotive stuff, right? It's the sort of language which motivates thousands of vegans who know absolutely fuck all about climate science, to camp out in London, causing havoc. Passionately, and emotionally doing everything they can to stop a "catastrophe" about which they have no clue. They watch David Attenborough on TV - who also knows bugger all about it - and conclude we must do something to prevent this catastrophe.
The most pessimistic models show that if we fail to act, then by 2200, 181 years from now, the planet could reach temperatures as high as 7c higher than before the industrial revolution (around 1800), at which time temperatures would stabliise and start to decline. Well these are incredibly high numbers compared to the 2c target agreed upon by world leaders in 2009. But even so, "ruined"? I think we could still grow crops in cheshire if the highest summer temperatures hit the mid 30's, in the year 2200.
And remember the earth's climate is always changing, and in fact has often been hotter than it is now. 55 millon years ago (the "PETM" period), the Earth's temperature rose incredibly quickly, with sea temperatures in the Artic reaching 10c - about 12c higher than they are now. Models show that to achieve the runaway catastrophic effects turning earth into something like Venus, and genuinely "ruining" the planet, we'd have to burn more 10x more than all existing fossil fuels and exhaust them completely.
So the planet isn't going to be "ruined" whatever we do. It's going to be "different", to a lesser of greater degree. Words like "catastrophe" are banded around by people with an axe to grind, seeking to shock people into action.
There is not much doubt that climate change is happening and it is man made. Actually there is *some* doubt. The "97% concensus" figure has been debunked a number of times. It's somewhere above 90% of scientists who believe this, but not necessarily 97%. But putting that to one side, people need to take the emotion out of this an read up on the data and the facts rather than take as gospel, predictions of doom from people who know no better. It doesn't help when for example the BBC has taken a policy decision to not report on any climate-change skeptical commentary or analysis. Nor that the 15 year+ cessation in global warming since 1999, which was not predicted by any models, was barely reported.
Have a read of this, if you're interested:
http://www.bbc.co.uk/earth/story/20151130-how-hot-could-the-earth-get