An abrupt climate change scenario and its implications for United States national security, the name of the report by peter Swartz and Doug Randall for the Pentagon in 2003:
"the United States and Australia are likely to build defensive fortresses around their country is because they have the resources and reserves to achieve self-sufficiency. With diverse growing climates, wealth, technology and an abundance of resources the United States can likely survive shortened growing cycles and harsh weather conditions without catastrophic losses. Borders will be strengthened around the country to hold back unwanted starving immigrants from the Caribbean islands (an especially severe problem) Mexico and South America."
since that report the United States has doubled its number of armed patrol agents. And it has added over 650 miles of walls and barriers along the US Mexico border. Furthermore this trend is worldwide, at the time of the Berlin Wall falling in 1988 there was a 16 border fences on the planet, today there are over 70 and the number has sharply increased after 9/11.
So this is where the ruling class is at, this is how they're dealing with climate change they're not having a green New Deal, they're laying the foundations for a fascistic 1984 type dystopian Society that has militarized borders and police to deal with refugees from climate catastrophes.
This is why it is imperative on leftists everywhere especially those of us in first World societies to put forward, educate agitate and organize alternative solutions, like a green New deal to this gross expansion of power by the ruling class in the government and private sector. It's quite literally socialism or barbarism.