Climate monitoring is a way to measure and predict atmospheric composition, climate trends, and weather patterns. 

Climate Monitoring

Environmental noise is one of the main reasons for discomfort for the population and the environment which ends up causing health problems and altering the conditions of the ecosystems. With people having to stay home, the use of private and public transportation has decreased significantly. Commercial activities have also stopped almost entirely.  

Reduction of Enviornmental Noise Level

The hydrosphere refers to all water on the earth's surface. Water quality improves with decreased pollution from human activity. Generally, good water: 
- Has no odor, is tasteless, and visibly clear 
- Has good conductivity, conductivity is not increased or decreased by any amount of pollutant 
- Has a dissolved oxygen content greater than 6 mg/L
- Has a relatively neutral pH
- Should have low levels, if any, of suspended particulate matter (SPM) 
- Has a low turbidity value, which measures the relative clarity of the water in units of FNU or NTU

Hydrosphere (Water) Pollution (Post-COVID-19)

The management of solid waste, which encompasses most types of discarded garbage, is a foremost environmental concern. Proper management of solid waste includes: 
- Collection of waste from urban areas once a week or more 
- Disposing only of waste that cannot otherwise be recycled
- Sufficient plans for gathering and storing waste 
- Relaying waste to facilities that will properly dispose of the waste in a landfill or burn the waste so it does not accumulate elsewhere 
- Handling of waste in such a way that public health is not jeopardized and no water or air pollution results   

Solid Waste Pollution (Post-COVID-19)

Humans contribute to air pollution by releasing harmful substances into the earth's atmosphere. Over many decades, harmful substances have accumulated to produce areas with severely polluted air. Good air: 
- Has low NO2, CO, SO2 and BC (black carbon) levels. BC may also be represented by BCff (fossil fuels) or BCbb (biomass burning) 
- Has low THC (total hydrocarbons) and low NMHC (non-methane hydrocarbons)
- Has no formaldehyde 
- Has low PM10 and PM2.5 levels, which measure fine particulates in the air 
- Has moderate O3 (ozone) levels, which can be harmful at too high or too low of a concentration 
- Has low aerosol optical depth (AOD) levels (<1), which measure electromagnetic radiation in the air as caused by pollutants 
- Has a low AQI value (0-100) which indicates good to moderate air quality 
- Has a low BTEX value (benzene, toluene, ethylbenzene, xylene), as these compounds are hazardous

Air Pollution (Post-COVID-19)

Noise pollution occurs when loud sounds accumulate to the point of being potentially harmful. Generally, noise levels are considered appropriate when: 
- nighttime noises are 5-10 dB lower than daytime noises 
- noises do not exceed 85 dB for long periods of time 
- noises generally remain below 60 dB
- residential areas have noise levels between 45-55 dB

Noise Pollution (Post-COVID-19)

Light pollution occurs when human activity results in an excessive amount of outdoors artificial light. Ideally: 
- Light pollution should be low enough that various star constellations are visible to the naked eye 
- Light pollution should register low on any number of meters available to calculate light pollution
- Light pollution should not be high enough to disrupt the local ecosystem or cause adverse effects on human health 

Light Pollution (Post-COVID-19)

- Since the COVID-19 outbreak, studies have shown that there has been an increase in visibility and overall air quality
- There is also evidence of a decrease in NO2 levels and an increase in ozone concentrations

Overview of Environmental Conditions Post-COVID-19 Outbreak

Recycling waste and prioritizing reusable items over disposable ones are effective methods for environmental conservation. These practices mitigate pollution, conserve natural resources, and reduce overall energy consumption.

Environmental Impact of Recycling

Following the COVID-19 outbreak, medical waste pollution worsened due to a massive increase in discarded protective equipment (such as masks and gloves) and infectious hospital waste. This unprecedented surge overwhelmed waste disposal facilities, leading to the accumulation of untreated waste and improper disposal practices. Consequently, proper medical waste management—which typically includes careful sorting, secure containment in biohazard bags, and safe disposal to avoid harmful incineration—was severely challenged, increasing the risk of environmental contamination and viral spread.

Medical Waste Pollution (Post-COVID-19)

Beaches provide services, including recreation and tourism, that are critical to coastal communities but frequently suffer from human-caused pollution. Following the COVID-19 outbreak, the subsequent lack of tourists led to notable improvements in the appearance of many beaches, resulting in clearer water and cleaner sand.

Beach Cleanliness (Post-COVID-19)

Researchers have found numerous instances of environmental changes following the COVID-19 outbreak. See: 
- Overview
- Air Pollution
- Hydrosphere (Water) Pollution
- Light Pollution
- Medical Waste Pollution
- Noise Pollution
- Solid Waste Pollution

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Comparing data from pre-COVID-19 outbreak and post-COVID-19 outbreak allow a wholistic picture of the pandemic's affect on the environment. 
- Environmental Conditions Pre-COVID-19 Outbreak
- Environmental Conditions Post-COVID-19 Outbreak 

Focuses for COVID-19 Environmental Effects

Zambrano-Monserratea, M., Alejandra Ruano, M., & Sanchez-Alcalde, L. (2020). Indirect Effects of COVID-19 on the Environment. Science of the Total Environment, 728. https://doi.org/10.1016/j.scitotenv.2020.138813 

Indirect Effects of COVID-19 on the Environment

Understanding how human activity impacted the environment prior to the COVID-19 outbreak allows for comparison to environmental conditions after the outbreak. See:
- Air Pollution
- Hydrosphere (Water) Pollution
- Light Pollution
- Medical Waste Pollution
- Noise Pollution
- Solid Waste Pollution

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