68. How is the large human population a contributing cause to climate change? 1. How many known planets are in our solar system? 2. What dwarf planet was downgraded from planetary status in 2006? 3....

68. How is the large human population a contributing cause to climate change?

1. How many known planets are in our solar system?

2. What dwarf planet was downgraded from planetary status in 2006?

3. How are the outer planets different from the inner planets aside from their location?