Heart disease
Brain tumor
Renal disease
Respiratory disease
Grasshopper
Frog
Paddy
Water
Arid zone
Dry zone
Intermediate zone
Wet zone
Hypotonic
Equimolar
Hypertonic
Isotonic
Swampy
Manas
Sunderbans
Gir forest
South temperate zone
Tropical zone
North temperature zone
Arctic zone
Stratosphere
Hygrosphere
Troposphere
Atmosphere
Lactobacillus
Algae
E.Coli
Virus
Primary pollutant
Androgenic pollutant
Organic pollutant
Inorganic pollutant
North temperate zone