1. Hemp as fiber to produce paper: will reduce the amount of paper made from trees. Hemp plants mature in 90 days and can be replanted in the same soil. 
http://www.theworldcounts.com/stories/Paper-Waste-Facts

2. Hemp as fiber to produce cloth instead of using cotton: Currently most people prefer cotton because it's a natural fiber, but most people do not know that almost all cotton is GMO and so contains pesticides.  Hemp is a truly natural and organic fiber, pest resistant, more durable, flame retardant and mold resistant. 
http://www.theworldcounts.com/counters/cotton_environmental_impacts/world_cotton_production_statistics
https://hemp-copenhagen.com/shop/cms-hemp-science.html#:~:text=potentially%20very%20beneficial%3A-,...,fabric%20%E2%80%93%20just%20like%20organic%20cotton
 

3. Hemp as oil for fuel instead of using petroleum: a natural, sustainable fuel and cheaper than petroleum.
http://www.theworldcounts.com/counters/interesting_facts_on_energy/energy_use_in_the_world
https://www.financialexpress.com/auto/car-news/forget-electric-cars-henry-fords-cannabis-car-was-made-from-hemp-10xstronger-than-steel-100-green/1384733/
 

4. Hemp as oil for producing lightweight plastic as strong as steel:
http://www.theworldcounts.com/counters/environmental_effect_of_mining/steel_environmental_impact_
http://www.theworldcounts.com/counters/environmental_effect_of_mining/environmental_impact_of_steel
https://www.hempplastic.com/
 

5. Hemp as building material instead of wood: using hemp in building is cheaper than using wood, requires no insulation, is flame resistant, mold resistant and over time becomes as hard as solid rock. Hemp's carbon plus the calcium from the lime which is added becomes calcium carbonate like seashells and is called hempcrete. 
http://www.theworldcounts.com/counters/degradation_and_destruction_of_ecosystems/facts_on_deforestation
http://www.theworldcounts.com/counters/degradation_and_destruction_of_ecosystems/why_is_deforestation_happening

6. Hemp as food instead of GMO and low-nutrition foods: hemp is a high source of protein and contains all essential amino acids as well as omega3 and omega6 oils.
http://www.theworldcounts.com/counters/world_food_consumption_statistics/world_meat_consumption_statistics

​7. Hemp as medicine: hemp oil has strong anti-inflammatory and other healing properties.
http://www.sciencedaily.com/releases/2008/07/080720222549.htm_

And, here are some frequently asked questions about the current status of medicinal hemp (marijuana) in the U.S. today:
http://norml.org/marijuana/medical/item/medical-frequently-asked-questions