The globe has in fact warmed a little over the last several decades but it's important to understand that it was NOT due to human activity. These are natural cycles that man does not and cannot control. It's actually the Sun that drives temperature and climate and people don't control the Sun.
However, bumper crops WORLDWIDE has been the result of the slightly warmer weather along with the CO2 enriched atmosphere. Of course the advocates of man-made Global Warming try to deny this fact, but the evidence is overwhelming.
Low food prices and repeated bumper crops worldwide (2000)
http://lists.iatp.org/listarchive/archive.cfm?id=9250
Four consecutive years of bumper crops worldwide (2000)
http://www.fas.usda.gov/info/speeches/ct030900tg.html
2007 U.S. Corn Crop Predicted Largest in History
http://usgovinfo.about.com/od/censusandstatistics/a/2007corn.htm
Predicting a record wheat crop worldwide (2008)
http://www.thestar.com/business/article/485394--bumper-crop-for-wheat
Historical Increase In Corn Yield (2009)
http://www.sciencedaily.com/releases/2009/03/090316133429.htm
Rice growers headed for strong yields in 2009
http://www.columbiatribune.com/news/2009/sep/10/rice-growers-headed-for-strong-yields-in-09/
Argentina's Bumper Crop of Corn (2010)
http://www.agriculturenewsarticles.com/agriculture_articles/2010/01/will-worldwide-corn-prices-decline-thanks-to-argentinas-bumper-crop-131642.htm
Global rice production set to hit record in 2011-2012
http://business.inquirer.net/42733/global-rice-production-set-to-hit-record-in-2011-2012%E2%80%94fao
Stupendous IPCC Prediction Failure: Global Warming Will Cause Crop Failure & Starvation --- BUT WHAT ARE THE FACTS --- charts clearly demonstrate the agricultural abundance that "global warming" has delivered
http://www.c3headlines.com/2011/10/another-stupendous-ipcc-prediction-failure-global-warming-will-cause-crop-failure-starvation.html
Many Bumper crops reported worldwide, while Warmists try to say crops are failing
http://tomnelson.blogspot.com/2011/09/these-people-think-you-stupid-we.html
With warmer weather, increased CO2 and plentiful rainfall, one would expect a dramatic increase in food production and that is exactly what has happened.
But of course Warmists are crestfallen over this fact because their narrative does not allow any good news in connection to their catastrophic man-made Global Warming scam.
I have many more links to reports of Bumper Crops Worldwide, please ask if you would like to see more.
-----------------------