Why does the snow on the green leaves melt so quickly?

Because the speed of melting snow depends on the heat absorbed by snow.

The sun shines in the tree pit, and the heat in the tree pit is not easy to dissipate, so the snow in the tree pit is easily heated. Dirty snow absorbs more sunlight heat than clean snow, so "spilled" snow melts faster and easier than clean snow.

Spring is coming, the weather is warm, and the snow and ice are beginning to melt. Some people will observe that dusty snow melts easily, while white and clean snow melts slowly. The reason is easy to find. The speed at which snow melts depends on how much heat it absorbs. Dirty snow absorbs more sunlight heat than clean snow, so a pile of snow on the canopy melts faster and easier.