Can man change or adjust mars environment to make it more suitable for human habitation? How?​

Explanation:

Reduce the amount of CO2 in the air.

Increase the planetary temperature.

Make the planet breathable.

Construct plants for generating super-greenhouse gases made of complex combinations of carbon,chlorine and flourine.

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

are there answer choices to this question? this seems like a question where you have options to choose from.