The algorescientists say the level of the oceans is rising by maybe one or two millimeters per year, which means in a hundred years it could be nearly a foot higher. Twelve inches in a century. Not that the level of the oceans has ever been constant since they formed.
But wait, other scientists have moaned for decades about how it's nearly impossible to measure sea level with millimeter accuracy. The measurement is confounded by barometric pressures, minute variations in planetary and lunar gravitional influence, minute variation in the earth's own gravity around the globe, causing tiny bulges and depressions in the affected water. The level of the water is affected also by winds and weather systems, minute variation in the specific gravity of the ocean water, and, finally, temperature.
Yet algorescientists can detect that one or two millimeters per year and use it to predict Armageddon and condemn the energy required to operate civilization.
Algorescientists are like many scientists in that they're working every day not just in the interest of science but also to support their families. Their lifeblood is grants. Without grant money they cannot support their families. The current global political climate forbids grant money to anyone who questions the established algorescientist orthodoxy. Skeptics are simply starved out of the field.