The three methods by which we can reduce the problem of waste disposal are :
(i) Adopting the 5R approach i.e;-Reduce, Reuse, Recycle, Refuse and Repurpose.
(ii) Segregation of waste into biodegradable and non-biodegradable waste.
(iii) Conversion of waste into useful components like biogas and then using compost as a fertiliser. BAL
OR
Ecosystem refers to the interaction of all the biotic and abiotic components present in a particular area. Energy flows across the trophic levels following the 10% law. Only 10% of the energy available to a trophic level is passed on to the next trophic level.(i) For example 10,000J energy is available to producer.
(ii) Then 1000J energy will be available to primary consumer.
(iii) 100J energy will be available to secondary consumer.
(iv) 10J energy will be available to tertiary consumers.