Was wondering if a word or phrase that would fit in the following context:
Global warming is an increasing threat to us today and forest conservation is the reliable in the long run way to combat it.
Relating to the identification of long-term or overall aims and interests and the means of achieving them:
the company should take strategic actions to cope with fundamental changes in the environment
strategic planning for the organization is the responsibility of top management
Oxford Dictionaries Online
Strategic has the advantage of emphasizing long-term, as opposed to tactical which concentrates on smaller, short-term objectives or consequences.
You could go for slow but sure (The Free Dictionary).
Global warming is an increasing threat to us today and forest conservation is the slow but sure way to combat it.
Just, for what it is worth, why not call it the enduring solution?
By using the word eventual, you imply that the solution isn't immediate. I think it would then sound better with a single word noun like solution instead of "way to combat it".
Global warming is an increasing threat to us today, and forest conservation is the eventual solution.
Global warming is an increasing threat to us today and forest conservation is the "slow is smooth, smooth is fast" way to combat it.
The "slow is smooth, smooth is fast" saying has its origins in the military. With that context the meaning is fairly obvious: moving fast, or rushing it, is reckless and will likely get you killed. If you move slowly, carefully and deliberate however, you are really moving as fast as you can without needlessly increasing the risk on your life.