Both cirrus cloud thinning and stratospheric aerosol injection are proposed mainly to address what?

1. Stratospheric sulphate aerosol injection is designed to mimic which natural event?

An ocean current shift

An ozone hole

A major volcanic eruption

A solar flare

2. What is the main goal of cirrus cloud thinning?

Blocking harmful UV rays

Cooling ocean surfaces directly

Increasing regional rainfall

Letting more outgoing heat escape to space

3. What is used to seed cirrus clouds and make them thinner?

Ice-nucleating particles

Chlorofluorocarbons

Carbon dioxide

Ozone

4. What is a documented risk of over-seeding cirrus clouds with ice-nucleating particles?