Bec it has NOT stopped and has NOT gone back to pre-70s levels. Scientists never ever claimed it would be a strictly increasing phenomenon, since they well know there are other factors that impact climate, and they have always said it take decades of evidence…which is why it took them so long to establish that AGW was happening in the first place. See graph below…one would have expected them to have reached sci certainty about AGW in the mid 80s if they had not needed so much evidence, but it took until 1995 for the 1st studies to find AGW at 95% confidence (.05 on the null).
Furthermore despite 1998 being an unusually hot year (due to a extreme el nino, which itself may have been enhanced by AGW), the temps on the whole have continued to increase, with 2014 being the hottest year yet and 2015 on track to be even hotter. You cannot say that is a flatline over the past 30 years. see graph.
Climate Science, Awareness and Solutions
Check out how the globally average temps fluctuate year to year, and also how the 5 years running average even fluctuates up & down.
It is not the way they do science – except for some uninformed, less educated weathermen – to pick the start year at 1998 (an unusually hot year due to the el nino), then compare succeeding years.
And Pope Francis, who does have good background in science, does understand that, so he is not bamboozled they way you all are by the oil-funded deceitful CC denial industry.
Here is a graph that controls for el nino, neutral, and la nina years, and all the lines are tilted upward:
http://www.skepticalscience.com/pics/JohnN-G_ENSO_trends.gif
Of course, if I act alone, it would be like spitting in the ocean, and that’s why Pope Francis is calling on all of us to act.
Like you, I didn’t imagine we could reduce our GHGs without sacrifice. That was 25 years ago. But my husband, like y’all, did not want to sacrifice, so he basically said we could do only those things that didn’t cost much. Well, it turns out over 25 years we have found many measures that either don’t cost or don’t require much effort, and many that save money right away or in the short- or long- run. The only thing I can think that cost more is buying organic food (when available)…but when you consider the great savings of $1000s from our other measures, then we can well afford that extra cost.
We lowered our GHG emissions and concomitant pollution by about a third thru energy/resource efficiency/conservation, and then more than another third by going on alt energy. If we weren’t so lazy and busy we’d be doing much more, but I figure so far we’ve reduced down to 60% or more lower than our 1990 emissions. (And I’m not counting that we’ve been living within 1 or 2 miles of work and shops for the past 46 years of our marriage…which we did to help save finite resources for future generations.)
Now I truly believe more than I even had before, if you seek first the kingdom of God and its righteous (and are not afraid to follow Popes Francis, BXVI, and JPII in this), all things will be added unto you.
I suggest starting with just some small measures that save, then you can plow that money into larger measures, etc.