The Salton Sea in California is actually a salty inland lake. The level of salt in the lake’s water—w

The level of salt (salt level   )in ( the  )Salton Sea in California has been increasing for years(  . ), ( As a result,   )and the water will ( would  )be( become  ) unsuitable for ( the  )populations near the sea( lake  ) if people do( did  ) not ( failed to  )take any solutions( measures  ). This reading (passage   )provides several ways to (prevent bad things from happening)( preclude undesirable consequences ). However, the lecturer does not agree with those options.

(The first option is pumping water from the lake to provide to other facilities so that the water can be evaporated into streams and cool down to become salt-free water.)( Unclear  ) However ( ,  )the lecturer argues that pumping water can also bring (about/result in/lead to   )other health risks. For example, it(this practice   ) can bring ( up  ) other types of chemicals from the bottom of the sea(lake   ). Some of these chemicals are harmful and can dissolve into the air. It will cause some unpredictable problems if people breathe them in.( For example, this measure is likely to bring up harmful chemicals from the lake bottom and then release them into the air, thereby posing health dangers to the people in the vicinity. 

In addition, the solution (to dilute)( grammatical error )  the salt level by pouring water from the ocean is also unacceptable. Because it( this measure )  would cost too much money( . )  to ( As an illustration, constructing ) construct such long pipes to take water from the ocean, and (goes beyond  ) the local government (‘s budget.  )  may not have enough money to pay for the resources.

Additionally, diluting the salt content by pouring water from the ocean is financially impractical. Without a doubt, constructing necessary facilities such as the long pipes from the ocean may bring an unbearable burden to the local government. 

Finally, the reading ( passage ) said (suggests that  ) some walls could be constructed by dividing the lake into several sections ( by building walls )  (to let salinity go into smaller sections)( unclear ) . However, if some activities ( natural disasters )  happened , like earthquakes, walls would be destroyed instantly. So, it( this approach )  only works in the short term.

There are ( Asteroids are )some large space objects made of rock and ice called asteroids. Some people think they [ these objects could be] are better options for colonization than other planets like Mars [ in terms of colonization ]. However, in this lecture, the lecturer argued[s  ] it[ that living in asteroids ] is [may  ] not[ be ] as positive as this passage expected[assumes  ].

First of all, although low gravity can provide safe landing on asteroids, people’s health can be a problem. People will meet healthy proplems in a low-gravity environment, for example, their muscles would be weaker and bone density problem can risk their health.

First, extremely low gravity would pose a serious health threat to people in landing on asteroids. As scientists suggest, people’s muscles can become weaker and their bones can become less dense under this low-gravity environment. 

It is agreed that there are abundant metals in asteroids. However, they may not as valuable as people expected. The cost of exploring these metals can be huge, and when they are brought back on the earth, there is no guarantee that these metals will be more valuable than the money cost, especially when too many metals are explored.

Finally, as this passage said, it is actually easy to reach some asteroids because they sometimes come within of near Earth’s orbit. However, it is not easy to return. As asteroids run periodically, they can be close when reaching them, but they will go far after that. It may farther than the way to Mars when you want to go back.