Making connections between how fast humans have improved our scientific understanding in just a few short decades, say from 1905 to the 1940's, is a testament to how fast things can really change once humans put their minds to it.  The US started our industrial revolution around the 1830's and in many ways, it continues (think the continued use of coal for instance) and all during that time we have been spewing green house gasses into our air.  For some, once it leaves the stack and dissipates from view, well, it's gone.  In fact, that's not true.  Some think once they send toxic waste down the drain, it's no longer an issue.  That's not true.  I don't want to confuse you with big picture views and I understand why you found my post to be not very enlightening.  I suggest some study on your part, besides listening to faux news. You might be surprised what you learn about human impact on our planet.