This sub-genre was started by Clive Cussler back with White Death and Polar Shift to Plague Ship and others.....nothing new. Clive Cussler "Environmental thrillers": Fire Ice is about the environmental disaster of someone using the sensitivity of ocean methane hydrate deposits for huge explosions, Polar shift is about environmental disaster with pole reversal, White death is about escaped genetically modified voracious fish, Shock Wave is about using long range oceanic pulses to kill areas, Sahara is about released toxins causing an epidemic disease, Fllod Tide is about the environmental disaster of blowing dikes in the Mississippi lowlands, Plague ship is about a human engineered disease to be used to stop overpopulation, Black Wind is about bad guys finding and using a WWII toxin, Medusa is about a deadly virus and the race for the antidote, and Arctic Drift is about a breakthrough discovery that can reverse global warming.
You've been advertising your book all over the net, which is a good way to sell more books. I suppose the only way to find out if it measures even close to Cussler is to read it.
After reading the synopsis and excerpts, I will not read it(but I changed my mind and it is a good book). The stereotyping of combat veterans is disgusting (and not knowing the purpose of stopping the spread of communism). Replacing the power of a downed nuclear reactor with cow dung methane digesters is absurd because of the power differential. (actually it was about the shut down of the bad nuclear reactor in the days of 3 Mile Island and Chernobyl being a fresh memory--in the 1990s new safe reactor tech was developed)
Well, maybe the excerpts don't show the "good vets"(actually there is one) or the other green power sources to replace the nuclear reactor. I do remember it reading that it took place in 1989, and that kind of got me as being not too contemporary(back before the two week wait to get into Yosemite or the outnumbering of Americans by invaders and the huge debt and red ink they have incurred). Maybe that was just part of the book(actually the two page last chapter brings the reader up to the late 1990s), but having "bad vets" at 60+ years old running around shooting at the good guys is a stretch for 2009(the book took place in 1989, with a Van Halen concert and romance and tear jerking mom reunion).
I may read it when it goes down in price, or on the used book market. I bought the signed edition direct. About the stereotyping of the militia, most militias are for the purpose of upholding the US Constitution, and even with this one, only three of the group were bad guys, pushed over the edge by unemployment they saw caused by the good guy who was not so good at first. It was part medical thriller, a small part environmental thriller, part action and part romance novel. Really mostly historical because of the 1989 time frame and a little miss leading now that safe nuclear power is part of green power, along with solar and wind, and a small part the methane capture plants.