Preliminary cleaning is essential for human consumption.
He said nature, which provides food and clean water and air, was essential for human wellbeing.
Water and sanitation are not a matter for charity, they are essential for human health and development".
Ecosystems of multiple species that interact with one another and their physical environments are essential for human societies.
Its argument is based on the unsupported assumption that intensive farm management and mass production of meat are essential for human well-being.
They are essential for human life, needed to digest food, to synthesize certain vitamins, to form a barricade against disease-causing bacteria.
The emerging EU legislation on the use of antibiotics in farming is setting a global standard for the sensible use of these drugs that are so essential for human health.
Life Support Systems (LSS) are essential for human spaceflight.
Thiamin is essential for human health.
Water is very much essential for human beings.
