I think global warming is stupid. The way the game makes it work is ridiculous. One day my grasslands turn into a desert? where has this happened that drastically in the real world?
The desertification of farmland is a well-known problem - it happens on lots of places around the earth. Sahel is a popular example, China another one. Check
this page for some information about the latter. Of particular interest to you is probably the line
"A report by a U.S. embassy official in May 2001 after a visit to Xilingol Prefecture in Inner Mongolia (Nei Monggol) notes that although 97 percent of the region is officially classified as grasslands, a third of the terrain now appears to be desert."
Causes of desertification vary and are often complex. Global warming is a contributor, but rarely the only cause. Also, desertification is a gradual process. But the game doesn't have the mechanics to successively deteriorate the fertility of a plot of land by small amounts each turn, until the land finally changes from grasslands to desert. Hence the game depicts a more abrupt change - as it does with changes in society organization (for example), which often happens much more gradual than it's depicted in the game.
Also you cant force other civs to be more clean.
Welcome to one of the big environmental problems of our time. It is not uncommon that one country suffers from the ecological sins of another. If a country uses a river for waste disposal and doesn't feel obligated to clean the water afterwards, then all other countries downstream will feel the consequences. The Chernobyl disaster spread nuclear pollution over at least a dozen of countries. Large-scale deforestation in one country can easily influence the weather patterns, humidity, fertility etc. in other countries.
I concede, however, that Civ4's implementation of ecological damage is rather crude, because it totally ignores local effects. It simply monitors a global pollution level and then indiscriminately turns some grasslands on the globe into deserts. A more realistic approach would weight the chances of falling victim to desertification according to the *local* level of pollution. You'd still have a chance be a victim of desertification even if your country is an ecological paradise, but it'd be much lower than it were if your country was churning out pollution.
It would also be nice if you could influence other countries' pollution levels via diplomacy.
I would like some way to safely remove this from the game.
Regardless of what I said - if a game mechanic doesn't add to your fun, remove it, previous posts already explained how to do that.
There's an alternative approach that might interest you: Lt.Bob's
40Civ mod changed the effect of global warming: Instead of turning grasslands to deserts, the mod puts fallout on affected tiles. This way the ecological damage is still part of the game, but it's reversible now (at the cost of having the workers unavailable for other tasks). This also makes more sense in case of nuclear ecodamage.
The changes in Lt.Bob's mod are easy to implement (it's just a matter of copy/pasting one section of one file and then recompiling the DLL), and the way he implemented them makes the optional - an XML value defines whether global warming should be handled the "new" or the "old" way.
And those who say global warming is real and man made can come visit me for a face full of snow.
The fact that global warming exists, and is contributed to by man, is well-known since at least the 70s. I know that there are lobbyists who try to detract from it, and that these have had some success among people who don't have the experience to tell solid science from lobbyist propaganda, but that really doesn't change the facts, it just increases the amount of misinformation.