Definitions are right here.
Now, do I believe that man
causes climate change?..no. That happens naturally, in cycles.
Does man
exacerbate climate change?...oh yeah. Does man make the swings in and the ferocity of weather more extreme??? Uhh yeah.
It's an issue. Again, if your own Department of Defense thinks it's an issue, it probably is.
Climate change is a long-term change in the average weather patterns that have come to define Earth’s local, regional and global climates. These changes have a broad range of observed effects that are synonymous with the term. Changes observed in Earth’s climate since the mid-20th century are...
climate.nasa.gov