What is harder is to come up with better alternatives. I'm not a big dam fan, but I'm not sure what alternatives you suggest? The obvious alternative, just to let people die from lack of water, and lack of food, has been considered and discarded.
China is a very difficult water situation. Most water is very polluted, with no real way to clean it.
There are inspirational approaches, such as what is happening in Tuscon:
investment in education, birth control, war, something, anything, to reduce the positively exponentiating numbers of people, each and every one of whom requires or desires our ridiculously high standard of living. not every human being can or should be so lucky as we, to have that delicious air conditioning at the expense of blase spots like Glen Canyon.
I responded with an angry diatribe, a vicious fustigation of your eager hopeful mesquite-pod flour and rainwater offer as the counter to the furtherance of mega-dam systems.
But it was too personal, too fraught with my own baggage. My own personal relationship to that place and its development.
You are right, I am just bitching.
I had a rain barrel when I lived in the wet wide treed middle lands of our country. They are illegal in my current locality. Ain't no mesquite flour protagony here.
And those sheep are going to starve. And their predators will eat sh#t.
Progress, though my friend. Progress. Yes, you are totally correct.
With my vow to sow constructive thoughts and ideas, I should also vow to forgo my true outlets, should turn and face the demands that progress places upon a man. I should go trap some bobcats and skin them for money. Better than graduate school, right?