Human impact on the environment is often more dramatic than the impact of most other living things because humans have a greater A. Need for water
B. Need for food
C. Need for air
D. Ability to filter water
E. Ability to adapt to change
F. Ability to alter the environment

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.