A hydrogen flame is nearly invisible in daylight because it is daylight. Hydrogen from the sun combines with oxygen in earth's atmosphere to produce heat and light, daylight. Hydrogen is very difficult to contain. it penetrates into most surface. When it combines with oxygen underneath the skin, it burns. This is why sunburns surface hours after exposure to the sun; only when the burnt sub-dermic skin move upwards and is exposed.
So, when Earth heats up at the atmosphere, it is either too much hydrogen or too much oxygen. Earth's core heating up is a different issue.
Prevent more hydrogen from penetrating Earth's surface and burning the soil might be the solution at some places. Since hydrogen is very penetrating, a layer of oxygen between layers of glass will enable water so produced to be collected too. The running water will cool the contraption. Water can be broken down into its basic elements and the oxygen recycled.
When the ground do not heat up too badly, vegetation will grow...
