What are TWO positive impacts of lack of human travel in the last year on our environment?

Weathering is an example of an external force of change. question 2 options: true false

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed

How many active volcanos are there in nicaragua