Still don’t believe in climate change? Then you’re either deep in denial or delirious from the heat....

I’m obliged to insert the disclaimer that no one event — no heat wave, no hurricane, no outbreak of tornadoes or freakish storms — can be definitively blamed on climate change. Any one data point can be an anomaly; any cluster of data points can be mere noise.

The problem for those who dismiss climate change...  is that the data are beginning to add up.

The National Oceanic and Atmospheric Administration says the past winter was the fourth-warmest on record in the United States. To top that, spring — which meteorologists define as the months of March, April and May — was the warmest since recordkeeping began in 1895. If you don’t believe me or the scientists, ask a farmer whose planting seasons have gone awry.