The artificial control of the weather, known as weather modification, seems like something out of a science fiction novel, but now it seems to have become a reality. Weather Modification International,a North Dakota-based company, is using planes to target clouds and draw out more rain from them.
  The concept behind the practice, which is called cloud seeding, has been around for decades. But there is new urgency due to climate change and a rapidly growing global population, which have disrupted（中断）global water supplies.
  Weather Modification describes cloud seeding as "an improvement" of the natural raining process.The technology makes storms more efficient by getting additional moisture（水汽） out of clouds.
  "If there are no clouds in the sky that have any moisture in them, then we can't do anything." said Brian Kindrat, an aircraft captain at Weather Modification. "What we can do is tap into what is there and assist mother nature."
  To do this, pilots target clouds with lots of moisture and put small amounts of a silver iodide（碘化银）mixture. The water in the clouds condenses（凝结）and becomes heavy. Then, it falls to the ground as rain.
  The company sees cloud seeding as part of a solution for droughts. "We aren't going to solve large climate shifts in areas, but if you went back and you looked in California and said if we had an additional 10%，15%，20% of snowpack and rain over the last 10 year,it would be significantly different." said Neil Brackin, president of Weather Modification. "With such a program as cloud seeding, additional water for cities and agriculture is available. In fact everybody can benefit from it." Brackin added.
  But there are concerns about cloud seeding's long-term impacts. For example,it's unclear how making it rain in one state affects a neighboring state. It's also up for debate who "owns" the water-such as which state or country-that comes out of the clouds. There are also environmental questions,such as ones related to the long-term impacts of silver iodide.
  Although some critics may have concerns about companies impacting the weather, the company denies that it's "playing God". "We're not really playing God. I think that's really overstating what we're doing." Brackin said. "We're being very specific and environmentally friendly in what we're doing to enhance the natural raining."



What can we learn about cloud seeding？ ______

A. It has not been put into practice yet.
B. It will enable people to control the weather at will.
C. It is a new concept put forward recently.
D. It can help deal with drought.

What did Brian Kindrat want to say about Weather Modification？ ______

A. It can create rain magically.
B. It can only depend on nature.
C. It has the ability to change nature.
D. It can produce rain from any cloud.

What can be inferred from Brackin's words in the last paragraph？ ______

A. He is full of confidence in the future of cloud seeding.
B. He thinks the existing cloud seeding needs to be improved.
C. He disagrees with the criticism aimed at the impact of cloud seeding.
D. He believes cloud seeding can do much more than increasing rainfall.

What's the author's attitude to the practice of cloud seeing？ ______

A. Objective.
B. Critical.
C. Approving.
D. Doubtful.