Leases should be treated just like contracts. They are enforceable and will obligate you to the terms of any signed agreement. Generally, there are two types of leases: "open end" leases and "closed end" leases.
What happens if someone sues you for causing property damage to their property? The best defense is always to outline each element of the plaintiff's case, and then ask yourself what proof the plaintiff has on each element, and what proof you can introduce or bring to court to disprove the plaintiff's version.
Trees protruding onto your property can cause undue stress and arguments between neighbors. The general rule is that if a neighbor's tree is causing actual problems with your property, or interfering with the use of your property, then you have certain rights as to that intrusion.
As a homeowner and landlord, you have an absolute right to your own property. That means no person can intrude on your land without your permission, an easement or common driveway exists, or zoning, or local, state or federal law acquires an interest in your property through eminent domain.
Auto accidents are unfortunate circumstances. They can happen to anyone, no matter how safe you are on the road. When an accident occurs, more than your health is at stake. You need to assess your injuries and do many things to ensure your recovery. Defending against persons claiming that you caused an accident can involve many factors.