Local environment changes can have global effects is True.
<u>EXPLANATION:</u>
Global climate is a set of several local climates, Local climates that act as subsets of global climate affect the global climate in many ways.
When a change takes place at a local level in the climate, eventually the global climate also gets impacted.
The changes in several subsets or local climates can influence global climate in several ways.
For instance, the melting of glaciers in the Himalayas can raise the water levels of the various oceans which in turn can have an affect on the climate of several regions and not just the Indian subcontinent.
The pressure gradient is the force that is produced due to the rotation of earth pressure cells that creates lighter air to move upwards and heavier to move downwards due to the difference in densities of air.
As the air above consists of lighter elements the oceanic air mostly consist of diatomic molecules of oxygen and nitrogen thus containing a large amount of water vapor, all these molecules have a mass that are pulled down by the gravity and this pull of gravity on columns of gas applies a force what we see an atmospheric pressure.
The gas particles and molecules of heavy and denser matter get stuck at the ground, similarly, as the air cools is descends and warm air rises. Thus upwards and downward motion of air causes convergence and divergence of molecules.