This isn’t adding ice just for the sake of denial, it’s adding to the Earth’s albedo. This in turn actually makes the Earth’s climate cooler, and then more ice will be produced naturally because of this.

It isn’t a process we need to continue forever, in fact it’s one that needs to be calculated so that we don’t do it TOO MUCH. The only worry would be cooling down too much.

Ice caps are melting? Guess what! We know how to make ice. It’s not that hard. Designing mostly-automated robot ships to go to the poles and rebuild the ice caps is well within our current technical capabilities. We just need to fund it.

Deforestation on a massive scale? Destruction of other biomes? Guess what! We know how to plant trees. We know how to plant grasslands. We know how to take barren, lifeless land and turn it back into a viable biome. It’s not that hard. In a lot of cases, if there’s neighboring areas where that biome still exists, all you have to do is dump a few tons of biomass (plant clippings, food waste, etc.) on the barren land and stand back and wait. The biomass will provide nutrients and keep the topsoil from blowing away, and the plants and animals from the neighboring biome will move in. In two decades, even if you don’t do anything besides dumping the biomass on it, you won’t be able to tell what was the barren area and what was the still-existing biome.

Coral reefs dying? Now, coral reefs are a bit more fragile than most biomes, but guess what! We still know how to replant/rebuild them, and in fact are working on that in places affected by coral reef die-off! And we’re learning how to do it better every day.

Desertification? Guess what! We know how to turn desert back into green space. They’re doing it on a large scale in China and sub-Saharan Africa. There are several different techniques, none of which are even very technology-intensive. It takes money and time and labor, but it’s perfectly doable. We know this because we’ve done it.

Plastic in the ecosystem, particularly in the ocean? Guess what! There’s a lot of people working on this, both on “how to remove plastic from the ocean” and “how to reuse/recycle it more efficiently.” And the techniques are improving by leaps and bounds every year. This is a solvable problem. These are all solvable problems.

So if you’re crushed by the weight of the coming environmental catastrophe … don’t be. These are all solvable problems! We can stop things from getting worse, and we can fix the things we’ve broken. The issue is political, not practical.

On the political side, of course, is the need to tighten up environmental regulations across the globe. (What’s the statistic, that 90% of pollution is caused by 100 corporations?) And then of course, we need to fund these programs on a large enough scale.

In some ways the political aspect is the hardest, but consider this: we are at a tipping point. Things are changing about the way politicians talk about climate change and ecological degradation. More ordinary people are concerned about this, which means more pressure on politicians. One of the ways that things are changing is that people–even conservatives–are starting to talk about “job opportunities in new green fields” and switching the conversation so that it’s not “rainforest vs. jobs” makes political action a lot more possible. And no, it’s not going to happen on its own, but it can happen.

You’ve probably heard before about plans to limit sunlight reaching the earth, but that is a sloppy approach. It will negatively impact plant life, both wild and cultivated, and economically impact poorer communities. Whereas increasing urban albedo will have the same target effect (reducing energy absorbed from sunlight) without those undesirable side effects.

The key thing here, though, is to achieve this without excessive greenhouse gas emissions. There are bound to be some, because we can’t magically transform our global industry before undertaking mitigation projects, they just mustn’t be so much as to render the project futile.