Resources - Types and Conservation The natural or man made meaningful substances which fulfil man's needs are known as resources. The resources fulfil man's specific objectives. They are natural gifts which are very valuable for human beings. Resources ➡️ natural or man- made 1. Natural Resources ➡️ forests, minerals, rivers, seas, solar energy, etc. 2. Man made Resources ➡️ artificial fertilisers, human resources, machines, means of transportation, etc. Human resources: efficiency, Human intelligence and knowledge Resource is a concept which changes with the passage of time, knowledge and technology. The real development of the resources lies in its effective and efficient utilisation. π― Types of Resources: Chiefly, there are 11 types of resources: biotic, abiotic, developed, potential, exhaustible, inexhausti...