Effect of particulate matter from quarry activities on crops and plant biodiversity in South-Eastern Nigeria.

In South-Eastern Nigeria, several quarry operations provide 8.7% of the country's annual GDP to the economy. These businesses do, however, frequently cause air pollution.

Assessment of radiation hazard indices due to natural radioactivity in soil samples from Orlu, Imo State, Nigeria.

The use of a Radiation Alert Inspector device and a gamma-spectrometry system fitted with a Sodium Iodide (NaI) detector was used to determine the radioactivity concentration level of natural radionuclides U, Th, and K in soil in several locations in Orlu, Imo State, Nigeria. 19 soil samples were collected for analysis from several locations of factories, agricultural farming-lands, gullies and water eroded areas, and soil deposits very close to flowing waters from rocks, due to environmental concerns arising from human activities in this region. The activity concentration values for U, Th, and K were found to range from 0.