Paragraph 2
Using astronaut
and moon dust could save scientists a
of money. It costs about $10,000 to transport 0.45kg of
from Earth to the Moon. The urine and moon dust
would be a much cheaper way of constructing things. A scientist said: "We have seen that a
product, such as the urine of the personnel who occupy the moon
, could be used." She added: "The actual water in the urine could be used for the
, together with [water] that can be obtained on the Moon, or a
of both." Scientists say another
of water on the Moon is in the ice that exists in some
. The scientists say they need to do more tests to find the best building material.
