Demonstrations, held at two separate locations in Israel's north and south, oppose plan by which 40,000 people would be evicted from their homes.
A nature reserve gives a discount to residents of Jewish settlements, but not to the Palestinian neighbors.
Jerusalem also plans to recycle a large part of the capital's waste.
Untreated industrial waste that was channeled into ground compromised water wells in Israel's north; three-year-old cleanup appears to be delayed due to funding difficulties.
Efforts to save the fish population in the Mediterranean waters off Israel’s coast are gaining momentum with the founding of a new organization called Save the Fish.
The Environmental Protection Ministry is setting up a new unit with the authority to arrest suspects, carry out searches and impound trucks at checkpoints.
Conservationists oppose plan to locate date plantation and reservoir in sight of Masada, but Dead Sea Works and others support it for its ability to prevent flooding of industrial pools.
Cabinet approves plans to allow developers get easier approval without consulting forestry officer.
In move, Israel follows lead of other OECD member countries who in recent years have adopted a list of measures that complement GDP.
State Comptroller Report Israel Is Bungling Cleanup of Polluted Industrial Sites, State Comptroller Says
The state comptroller cites problems such as a rocket-fuel ingredient polluting water used at orange orchards.