They have Raised $15 MILLION in Funding, primarily from Awz Ventures, a CANADIAN-ISRAELI Venture Capital Firm, and SolarEdge, an ISRAELI Green Energy Company. Critics express Concerns about the Potential RISKS and ETHICAL Implications of Such TECHNOLOGY, including Unintended Consequences for the CLIMATE and Potential Exploitation of the Atmosphere.
 
Here's a More Detailed Breakdown:

WHAT THEY DO:
Stardust Solutions aims to DEPLOY Reflective Particles into the Stratosphere, a Layer of the Atmosphere, to Reflect SUNLIGHT and Mitigate the Effects of GLOBAL WARMING. This is a Form of SOLAR Geoengineering, a Field that Explores Ways to INTENTIONALLY ALTER Earth's CLIMATE. 

FUNDING:
The Company has Secured $15 MILLION in FUNDING from PRIVATE Investors, with Notable Investments from Awz Ventures and SolarEdge. 

CONCERNS and CRITICISMS:
Many Experts and Organizations, like the Center for International Environmental Law (CIEL), raise Concerns about the Potential RISKS of Seploying such TECHNOLOGY. These include the Possibility of Unintended CLIMATE Consequences, such as DISRUPTIONS to WEATHER PATTERNS and DROUGHTS. Additionally, there are Concerns about the Potential for This TECHNOLOGY to be Used as a Substitute for REDUCING Greenhouse GAS EMISSIONS, potentially DELAYING {{Meaningful}} (wink wink) CLIMATE ACTION. 

ETHICAL CONSIDERATIONS:
Critics like CIEL Emphasize that the Atmosphere is a Shared Resource(duh) and that Large-Scale Geoengineering Experiments carry Significant ETHICAL and Human Rights Implications. 

OTHER GEOENGINEERING APPROACHES:
Stardust Solutions' approach is just One of SEVERAL Proposed Geoengineering Technologies. OTHERS include MARINE CLOUD BRIGHTENING, CITRUS CLOUD THINNING, and Space-Based Techniques.