- Many other planets in our solar system being looked at have a few characteristics that are similar to Earth. However, there are a few other planets that also have some characteristics that are different from Earth. Let's examine these planets and their differences a little closer.

- For me, the thought of being alone is enough to make my heart ache. I need to interact with people on a daily basis or else I start to feel melancholy. It's one of my biggest fears in life—being without others to share my joys and sorrows with. However, I'm not sure that humans are the loneliest creatures in our universe. We always have each other, after all. When we're at our loneliest, there are always other people we can turn to for comfort. Other species are seemingly alone from birth until death. They don't have friends or family members around them. They don't have anyone they can share their food with or play with when they're little. They don't have support networks they can fall back on in case of crisis or tragedy. In fact, there are some animals who aren't even given names! In this sense, I think humans aren't the loneliest creatures in our universe. We may feel lonely at times, but we've got it better than most animals out there!

- To keep the life on the earth, we should do a lot of things.
Water is necessary to our life and plants.We should not pollute water.For example, we can take a bus or walk or ride a bike instead of driving, which can reduce the car pollution.
Air is also important to us and plants.We should plant more trees because trees can absorb carbon dioxide and produce oxygen.In addition, we can use clean energy such as solar energy to replace coal and other fossil fuels.