LoL. It takes two years to get the MS. It typically takes three MORE years to get a PhD. About two years MORE of classes beyond the MS and a year to research and write a dissertation (many times two years). And to compare a thesis to a dissertation is ridiculous. A dissertation requires much more work.
Most of the post graduate work is in teaching and research not additional academics.
There is no requirement to have a PhD to be an "environmental scientist.
If you have a BS in environmental science you are by definition an Environmental Scientist. If you are employed in such a position regardless of your degree you are an ES.
That wasn’t my experience in grad school as an engineer. I had quite a few classmates pursuing a PhD in physics and they took classes for a couple years. Typically two classes per semester. Three was considered a heavy load . At the same time you would have research credits representing your research. If they were on a TA instead of a RA, they would be responsible for teaching 1-2 sections of a class. I had a TA - pretty cool when they pay you to go to school!
Most of the climate scientists authoring papers seem to be PhDs from my experience. Those are the people we are talking about, the study authors.
The dumbest thing we could possibly due is attempt to actually lower the planet’s temperatures when we don’t even have enough data to understand the natural cycle.
Best we can tell from the historical data and proxies is that we’re still well below the last two warming periods maximums and what followed them of course were serious cooling periods that led to war, famine, disease etc killing millions and forcing hundreds of millions into living very hard lives to survive.
The military has long term plans for every contingency. That’s the whole purpose of the Pentagon Planners.
The current priorities were set in 2015.
Nothing would threaten humanity as much as severe cooling. As little as 3-5 degrees would lead to famine in short order due shortened growing seasons and the lack of available water.
Glaciers are pretty but that water can’t be utilized unless the glaciers are melting.