Originally Posted by lonelyjew
Would you care to explain your conclusion? I suppose the fact that there have been lakes naturally formed by icebergs that there are no lakes that have been made by human activity lol.
This. The temperature of the earth goes through high and low cycles since prehistoric times (at least as far as we know based on like geological evidence). So it is very likely that that at some point in the past million or so years of earth's history the temperature had points where the earth was at all time lows (at like ice ages) and highs.
Just when people talk about climate change now, they usually talk about how the changes that the earth is experiencing now are much more rapid and not following the normal patterns that it used to.
It's sort of impossible to know exactly how much we've caused the problem (since we don't have an earth that is identical to ours except without people on it as a control planet), but to assume we haven't contributed to it at all seems a little naive to me. It's more of a 'how much' have we contributed to climate change vs 'have we'.