What information from Mars can the astronauts obtain? Describe the condition of the Mars environment. Some scientists discuss the possibility to use greenhouse gas on the atmosphere of planet Mars, to make it habitable. Do you approve of this idea?

1. http://www.golabz.eu/spaces/planeta-marte-un-proiect-pentru-umanitate
MARS-A PROJECT FOR HUMANITY

2. One of the biggest curiosities of mankind is the universe .
Over time , scientists have tried to answer the question : "Exist life on
Mars planet? "
Mars is the fourth planet from the Sun and
the second smallest planet in the Solar
System, after Mercury Named after
the Roman god of war, it is often referred
to as the "Red Planet" because the iron
oxide prevalent on its surface gives it
a reddish appearance.Mars is a terrestrial
planet with a thin atmosphere, having
surface features reminiscent both of
the impact craters of the Moon and the
volcanoes, valleys, deserts, and polar ice
caps of Earth. The rotational period and
seasonal cycles of Mars are likewise similar
to those of Earth, as is the tilt that
produces the seasons.

4. Liquid water, necessary for life as
we know it, cannot exist on the
surface of Mars except at the
lowest elevations for minutes or
hours. Liquid water does not
appear at the surface itself, but it
could form in minuscule amounts
around dust particles in snow
heated by the Sun.[66][67] Also, the
ancient equatorial ice sheets
beneath the ground may slowly
sublimate or melt, accessible
from the surface via caves.
Water on Mars exists almost
exclusively as water ice, located in
the Martian polar ice caps and
under the shallow Martian
surface even at more temperate
latitudes.
There is disagreement in the
scientific community as to whether
or not the recent gully streaks were
formed by liquid water. Some
suggest the flows were merely dry
sand flows.Others suggest it may be
liquid brinenear the surface, but the
exact source of the water and the
mechanism behind its motion are
not understood.

14. Mars Science Laboratory
The Mars Science Laboratory mission is a NASA project that
launched on November 26, 2011 the Curiosity rover, a
nuclear-powered robotic vehicle, bearing instruments
designed to assess past and present habitability conditions
on Mars.The Curiosity rover landed on Mars on Aeolis Palus
in Gale Crater, near Aeolis Mons (a.k.a. Mount Sharp),on
August 6, 2012.
On 16 December 2014, NASA reported the Curiosity rover
detected a "tenfold spike", likely localized, in the amount
of methane in the Martian atmosphere. Sample
measurements taken "a dozen times over 20 months"
showed increases in late 2013 and early 2014, averaging "7
parts of methane per billion in the atmosphere." Before and
after that, readings averaged around one-tenth that level. In
addition, high levels of organic chemicals,
particularly chlorobenzene, were detected in powder drilled
from one of the rocks, named "Cumberland", analyzed by
the Curiosity rover.