Answer:
Insufficient dissolved oxygen in the water can cause: death of adults and young reduced growth failed eggs and larvae changes that occur in the species in various water bodies.
Why are we living longer now? Well during the Industrial revolution we made a significant reduction in the amount of deaths by increasing in food production and distribution, improving public health (mainly water and sanitation), and as for medical technology, we made vaccines and antibiotics. Modern medicine prospers every day, being able to cure almost any disease. Because of all of this we gradually started living longer. Back in 1950, life expectancy was 68.2 years old. Nowadays, that
number has risen to 79.12 years old and is expected to increase up to
83.9 years old by the year 2050.
Answer:
I can guess the environment has changed since the last time
Explanation:
