Will Earth explode or be thrown out of orbit if global warming continues?
No. No change in orbit or explosiveness!
What will happen is that the mean average temperature of the
atmosphere will increase, resulting in ice caps melting, which will
cause sea levels to rise, and triggering climatic changes. These
changes will alter the type of crops which can be grown in a given
location, cause species to change their migratory habits, and
change weather patterns. The Earth itself, the planet, will not be
affected, nor will the planet's orbit around the Sun be
With regard to the oceans rising - the impact will not be
entirely due to the added water generated by melting ice caps. The
water in the oceans will become less dense due to its being warmer
and less saline. Less dense water will not have the weight to
compress the deep waters as tightly and they will expand slightly.
It is estimated water at the bottom of the Pacific is compressed by
about 1.08% at 4000 m. Releasing this pressure by even a small
amount could result in a depth increase of several meters.
(Reference:See the link below.)