It was hoped, early on in the terraforming, that the waste heat from our growing arcologies would contribute significantly to planetary warming.

Per degree of planetary warming, it's even more costly than repairing-or enlarging-the soletta array, something for which we've been petitioning the Imperium for years.

They say the evidence of a tie between carbon dioxide and planetary warming over the last few centuries is so compelling that any long-term evidence to the contrary must somehow be tainted.

As environmentalism turns its focus to global problems like ozone depletion and planetary warming, the self-interest evident in working with others becomes ever more apparent.

If a substantial amount of the carbon should enter the atmosphere, it would intensify the planetary warming.

Today, such archival readings are seen as unrivaled yardsticks for judging long-term processes like global climatic change and planetary warming.

Perhaps, one day, we can install orbital mirrors (of the thousands of square kilometers) at lagrange or some other points... to "contribute" to planetary warming.

If it does, some scientists fear, many ecosystems could become saturated with nitrogen, increasing environmental damage, and nitrous oxide could move to the fore as a cause of planetary warming.

Steps are being taken to control gases that contribute to planetary warming, even though it could be argued that the evidence that such warming will occur is not conclusive.

Should a substantial amount of the carbon enter the atmosphere, it would accelerate planetary warming.